PXF4336 Datasheet, PDF (62/425 Pages) Infineon Technologies AG – ABM Premium ATM Buf fer Manager

ABM-P
PXF 4336 V1.1
Functional Description
SSRAM interface
UTOPIA
upstream
receive
MASTER
UTOPIA
downstr.
transmit
MASTER
µP interface
SDRAM interface
ABM-P Core
upstream
Common
LCI Table
ABM-P Core
downstream
SDRAM interface
UTOPIA
upstream
transmit
SLAVE
UTOPIA
downstr.
receive
SLAVE
JTAG interface
Figure 3-12 ABM-P in Uni-directional Mode Using one Core
3.3.1 LCI Translation in Mini-Switch Configurations
In Uni-directional applications, the ABM-P can be programmed to make a minimum
header translation. This is necessary in a Mini-Switch configuration as both the forward
and backward direction of a connection traverse the devices in the same direction. The
OAM functions in the Infineon ALP (PXB 4350) or AOP (PXB 4340) devices need the
same LCI for forward and backward direction of a connection.
This is clarified by the example shown in Figure 3-13 in which a connection is set up
from PHY₁ to PHY₂. VPI/VCI₁ is the identifier on the transmission line where PHY₁ is
connected. The terminal sends ATM cells with this identifier and expects cells in the
backward direction from PHY₂ with the same identifier. The ALP in the upstream
direction translates VPI/VCI₁ into LCI₁, the unique local identifier for this connection in
the upstream direction. Similarly, for the backward connection from PHY₂ to PHY₁, the
ALP receives ATM cells from PHY₂ with the identifier VPI/VCI₂ and translates them into
LCI₂.
Data Sheet
62
2001-12-17